John c



(No Model.)

J. O. KELTON.

REAR SIGHT FOR FIRE ARMS.

No. 359,680. Patented Mar. 22, 1887.

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NITED STATES PATENT Fries.

JOHN C. KELTON, OF "WASHINGTON, DISTRICT OF COLUMBIA.

REAR SIGHT FOR FIRE-ARMS.

SPECIFICATION forming part of Letters Patent No. 359,680. dated March22, 1887.

Application filed December 18, 1886. Serial No. 221,930. (No model.)

T0 all whom, it may concern.-

Be it known'that 1, JOHN G. KELToN, a citizen of the United States,residing at \Vaslr ington, in the District of Columbia, have inventedcertain new and useful Improvements in Rear Sights for Rifles, of whichthe follow-- ing is a full and clear description, reference being had tothe accompanying drawings, forming part of this specification, in whichFigure 1 represents a face view of a sight embodying my improvements.Fig. 2 is a sectional view of the same on the line as x of Fig. 1. I

My invention relates especially to rear sights for hammerless guns; andit consists in the peculiar construction and combination of deviceswhich I shall hereinafter fully describe and claim. I

To enable others skilled in the art to which my invention appertains tomake and use the same, I will now describe its construction and indicatethe manner in which the same is carried out.

This improved sight consists of two thin plates of steel, a a, supportedat right a11- gles. Through the horizontal plate is cut the slot 2), tosight through, while in the vertical plate a, andjust below thehorizontal slot-b, is a small rectangular opening, 6, to light up theslot, and at the same time secure a full view of the object aimed at. Ashutter, m, is fitted to slide over the vertical plate, and is moved toclose the opening 0, said shutter having a small opening, a, which isused when the larger opening 0 permits too large a field of View.

The plates at a are fastened to a cylinder, (1, in which is cut a femalescrew, and are given a lateral motion by means of a rod, 6, on a smallpart ofwhich is a thread which works in-the cylinder. The sightis alsoprovided with a base, h, provided'with a front projection which isgraduated substantially as shown in Fig. '1.

Over the horizontal plate is a permanent cover, f, to screen the slot 12from rain, dirt, or the glare of the sun. The sight and the graduatedbase are supported by two legs, 9 9, one graduated with a point-blankelevation for each hundred yards, and so numbered. The other legisgraduated for the point-blank of the intermediate distances of case ofa rifle having one turn in twenty-two inches,) to allow automaticallyfor the drift of the projectile.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. An improved sight having a horizontal sightplate with slot formedtherein to sight through, and a permanent cover for the same, incombination with a vertical plate having an opening. contiguous to andadapted to light up the sightslot, substantially as herein described.

2. A sight having the legsg, adapted to straddle thetang just in rear ofthe barrel, and having racks upon their rear, in combination withpinions engaging said racks and elevating the sight, substantially asherein described.

3. The combination, with a sight having a horizontal slotted sight-plateand a vertical plate having an opening for lighting up the slot, of ashutter, m, having an opening, n, smaller than the opening in thevertical plate, and moving across the face thereof, substantially asherein described.

4. An improved sight placed on the stock just in rear of the barrel andstraddling the tang, comprising the graduated legs 99, havingpinion-slots, the pinion-wheels is, engaging the slots to elevate ordepress the sight, a graduated base, a cylinder, and rod on said basefor adjusting the sight laterally, aslotted horizontal sight-plate, anda permanent cover for the same, in combination with a vertical platehaving an opening, 0, for lighting up the slot, and a movable shuttersliding upon the vertical plate for closing the aperture 0,substantially as herein described.

JOHN C. KELTON.

lVitnesses:

D. S. CLARK, W. H. PATTERSON.

